Fix docker image build

[lhoupert]

Hi,
Sorry I realised my previous pull request was wrong as the dockerfile was not relevant for a fork.
I did some changes and tested, it seems to be working fine on my fork: https://github.com/lhoupert/scc/pkgs/container/scc

You can test running the v0.0.2 of docker image generated on my fork with the command below :

docker run --rm -it -v "$PWD:/pwd"  ghcr.io/lhoupert/scc:v0.0.2 scc /pwd

This should fix the github action. Each new release of scc should also create a tagged docker image

[boyter]

No problem. It happens. Thanks for fixing it though!